diff --git a/system/Commands/Translation/LocalizationFinder.php b/system/Commands/Translation/LocalizationFinder.php
index d8fbbf1aad50..7abc3209c07d 100644
--- a/system/Commands/Translation/LocalizationFinder.php
+++ b/system/Commands/Translation/LocalizationFinder.php
@@ -80,7 +80,7 @@ public function run(array $params)
         if (is_string($optionDir)) {
             $tempCurrentDir = realpath($currentDir . $optionDir);
 
-            if (false === $tempCurrentDir) {
+            if ($tempCurrentDir === false) {
                 CLI::error('Error: Directory must be located in "' . $currentDir . '"');
 
                 return EXIT_USER_INPUT;
@@ -111,7 +111,12 @@ private function process(string $currentDir, string $currentLocale): void
         $files    = iterator_to_array($iterator, true);
         ksort($files);
 
-        [$foundLanguageKeys, $countFiles] = $this->findLanguageKeysInFiles($files);
+        [
+            'foundLanguageKeys' => $foundLanguageKeys,
+            'badLanguageKeys'   => $badLanguageKeys,
+            'countFiles'        => $countFiles
+        ] = $this->findLanguageKeysInFiles($files);
+
         ksort($foundLanguageKeys);
 
         $languageDiff        = [];
@@ -135,7 +140,7 @@ private function process(string $currentDir, string $currentLocale): void
                 $newLanguageKeys = array_replace_recursive($foundLanguageKeys[$langFileName], $languageStoredKeys);
 
                 if ($languageDiff !== []) {
-                    if (false === file_put_contents($languageFilePath, $this->templateFile($newLanguageKeys))) {
+                    if (file_put_contents($languageFilePath, $this->templateFile($newLanguageKeys)) === false) {
                         $this->writeIsVerbose('Lang file ' . $langFileName . ' (error write).', 'red');
                     } else {
                         $this->writeIsVerbose('Lang file "' . $langFileName . '" successful updated!', 'green');
@@ -155,14 +160,30 @@ private function process(string $currentDir, string $currentLocale): void
 
         $this->writeIsVerbose('Files found: ' . $countFiles);
         $this->writeIsVerbose('New translates found: ' . $countNewKeys);
+        $this->writeIsVerbose('Bad translates found: ' . count($badLanguageKeys));
+
+        if ($this->verbose && $badLanguageKeys !== []) {
+            $tableBadRows = [];
+
+            foreach ($badLanguageKeys as $value) {
+                $tableBadRows[] = [$value[1], $value[0]];
+            }
+
+            ArrayHelper::sortValuesByNatural($tableBadRows, 0);
+
+            CLI::table($tableBadRows, ['Bad Key', 'Filepath']);
+        }
     }
 
     /**
      * @param SplFileInfo|string $file
+     *
+     * @return array<string, array>
      */
     private function findTranslationsInFile($file): array
     {
         $foundLanguageKeys = [];
+        $badLanguageKeys   = [];
 
         if (is_string($file) && is_file($file)) {
             $file = new SplFileInfo($file);
@@ -172,7 +193,7 @@ private function findTranslationsInFile($file): array
         preg_match_all('/lang\(\'([._a-z0-9\-]+)\'\)/ui', $fileContent, $matches);
 
         if ($matches[1] === []) {
-            return [];
+            return compact('foundLanguageKeys', 'badLanguageKeys');
         }
 
         foreach ($matches[1] as $phraseKey) {
@@ -180,6 +201,8 @@ private function findTranslationsInFile($file): array
 
             // Language key not have Filename or Lang key
             if (count($phraseKeys) < 2) {
+                $badLanguageKeys[] = [mb_substr($file->getRealPath(), mb_strlen(ROOTPATH)), $phraseKey];
+
                 continue;
             }
 
@@ -189,6 +212,8 @@ private function findTranslationsInFile($file): array
                 || ($languageFileName === '' && $phraseKeys[0] === '');
 
             if ($isEmptyNestedArray) {
+                $badLanguageKeys[] = [mb_substr($file->getRealPath(), mb_strlen(ROOTPATH)), $phraseKey];
+
                 continue;
             }
 
@@ -201,7 +226,7 @@ private function findTranslationsInFile($file): array
             }
         }
 
-        return $foundLanguageKeys;
+        return compact('foundLanguageKeys', 'badLanguageKeys');
     }
 
     private function isIgnoredFile(SplFileInfo $file): bool
@@ -334,12 +359,13 @@ private function isSubDirectory(string $directory, string $rootDirectory): bool
     /**
      * @param SplFileInfo[] $files
      *
-     * @return array<int, array|int>
-     * @phpstan-return list{0: array<string, array<string, string>>, 1: int}
+     * @return array<string, array|int>
+     * @phpstan-return array{'foundLanguageKeys': array<string, array<string, string>>, 'badLanguageKeys': array<int, array<int, string>>, 'countFiles': int}
      */
     private function findLanguageKeysInFiles(array $files): array
     {
         $foundLanguageKeys = [];
+        $badLanguageKeys   = [];
         $countFiles        = 0;
 
         foreach ($files as $file) {
@@ -349,9 +375,13 @@ private function findLanguageKeysInFiles(array $files): array
 
             $this->writeIsVerbose('File found: ' . mb_substr($file->getRealPath(), mb_strlen(APPPATH)));
             $countFiles++;
-            $foundLanguageKeys = array_replace_recursive($this->findTranslationsInFile($file), $foundLanguageKeys);
+
+            $findInFile = $this->findTranslationsInFile($file);
+
+            $foundLanguageKeys = array_replace_recursive($findInFile['foundLanguageKeys'], $foundLanguageKeys);
+            $badLanguageKeys   = array_merge($findInFile['badLanguageKeys'], $badLanguageKeys);
         }
 
-        return [$foundLanguageKeys, $countFiles];
+        return compact('foundLanguageKeys', 'badLanguageKeys', 'countFiles');
     }
 }
diff --git a/system/Helpers/Array/ArrayHelper.php b/system/Helpers/Array/ArrayHelper.php
index 5b359a761384..04f4bd335623 100644
--- a/system/Helpers/Array/ArrayHelper.php
+++ b/system/Helpers/Array/ArrayHelper.php
@@ -19,7 +19,9 @@
  * If there are any methods that should be provided, make them
  * public APIs via helper functions.
  *
+ * @see \CodeIgniter\Helpers\Array\ArrayHelperDotKeyExistsTest
  * @see \CodeIgniter\Helpers\Array\ArrayHelperRecursiveDiffTest
+ * @see \CodeIgniter\Helpers\Array\ArrayHelperSortValuesByNaturalTest
  */
 final class ArrayHelper
 {
@@ -297,4 +299,21 @@ public static function recursiveCount(array $array, int $counter = 0): int
 
         return $counter;
     }
+
+    /**
+     * Sorts array values in natural order
+     * If the value is an array, you need to specify the $sortByIndex of the key to sort
+     *
+     * @param int|string|null $sortByIndex
+     */
+    public static function sortValuesByNatural(array &$array, $sortByIndex = null): bool
+    {
+        return usort($array, static function ($currentValue, $nextValue) use ($sortByIndex) {
+            if ($sortByIndex !== null) {
+                return strnatcmp($currentValue[$sortByIndex], $nextValue[$sortByIndex]);
+            }
+
+            return strnatcmp($currentValue, $nextValue);
+        });
+    }
 }
diff --git a/tests/_support/Services/Translation/TranslationTwo.php b/tests/_support/Services/Translation/TranslationTwo.php
index 71e5e663b27e..aa6d1e0a9ee2 100644
--- a/tests/_support/Services/Translation/TranslationTwo.php
+++ b/tests/_support/Services/Translation/TranslationTwo.php
@@ -26,6 +26,13 @@ public function list()
         $translationError6 = lang('TranslationTwo...');
         $translationError7 = lang('..invalid_nested_key..');
 
+        $copyTranslationError1 = lang('TranslationTwo');
+        $copyTranslationError2 = lang(' ');
+        $copyTranslationError3 = lang('');
+        $copyTranslationError4 = lang('.invalid_key');
+        $copyTranslationError5 = lang('TranslationTwo.');
+        $copyTranslationError6 = lang('TranslationTwo...');
+        $copyTranslationError7 = lang('..invalid_nested_key..');
         // Empty in comments lang('') lang(' ')
     }
 }
diff --git a/tests/system/Commands/Translation/LocalizationFinderTest.php b/tests/system/Commands/Translation/LocalizationFinderTest.php
index f5cc38ec7b2f..fa976c752c24 100644
--- a/tests/system/Commands/Translation/LocalizationFinderTest.php
+++ b/tests/system/Commands/Translation/LocalizationFinderTest.php
@@ -103,6 +103,15 @@ public function testShowNewTranslation(): void
         $this->assertStringContainsString($this->getActualTableWithNewKeys(), $this->getStreamFilterBuffer());
     }
 
+    public function testShowBadTranslation(): void
+    {
+        $this->makeLocaleDirectory();
+
+        command('lang:find --dir Translation --verbose');
+
+        $this->assertStringContainsString($this->getActualTableWithBadKeys(), $this->getStreamFilterBuffer());
+    }
+
     private function getActualTranslationOneKeys(): array
     {
         return [
@@ -193,6 +202,26 @@ private function getActualTableWithNewKeys(): string
             TEXT_WRAP;
     }
 
+    private function getActualTableWithBadKeys(): string
+    {
+        return <<<'TEXT_WRAP'
+            +------------------------+--------------------------------------------------------+
+            | Bad Key                | Filepath                                               |
+            +------------------------+--------------------------------------------------------+
+            | ..invalid_nested_key.. | tests/_support/Services/Translation/TranslationTwo.php |
+            | ..invalid_nested_key.. | tests/_support/Services/Translation/TranslationTwo.php |
+            | .invalid_key           | tests/_support/Services/Translation/TranslationTwo.php |
+            | .invalid_key           | tests/_support/Services/Translation/TranslationTwo.php |
+            | TranslationTwo         | tests/_support/Services/Translation/TranslationTwo.php |
+            | TranslationTwo         | tests/_support/Services/Translation/TranslationTwo.php |
+            | TranslationTwo.        | tests/_support/Services/Translation/TranslationTwo.php |
+            | TranslationTwo.        | tests/_support/Services/Translation/TranslationTwo.php |
+            | TranslationTwo...      | tests/_support/Services/Translation/TranslationTwo.php |
+            | TranslationTwo...      | tests/_support/Services/Translation/TranslationTwo.php |
+            +------------------------+--------------------------------------------------------+
+            TEXT_WRAP;
+    }
+
     private function assertTranslationsExistAndHaveTranslatedKeys(): void
     {
         $this->assertFileExists(self::$languageTestPath . self::$locale . '/TranslationOne.php');
diff --git a/tests/system/Helpers/Array/ArrayHelperSortValuesByNaturalTest.php b/tests/system/Helpers/Array/ArrayHelperSortValuesByNaturalTest.php
new file mode 100644
index 000000000000..312eb0853c9d
--- /dev/null
+++ b/tests/system/Helpers/Array/ArrayHelperSortValuesByNaturalTest.php
@@ -0,0 +1,121 @@
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Helpers\Array;
+
+use CodeIgniter\Test\CIUnitTestCase;
+
+/**
+ * @group Others
+ *
+ * @internal
+ */
+final class ArrayHelperSortValuesByNaturalTest extends CIUnitTestCase
+{
+    private array $arrayWithStringValues = [
+        'apple10',
+        'banana',
+        'apple1',
+        'банан',
+        'Banana',
+        'Apple',
+        100000,
+        'яблоко',
+        1200,
+        13000,
+        'Банан',
+        'Яблоко',
+        'apple',
+    ];
+    private array $arrayWithArrayValues = [
+        ['apple', 'Banana'],
+        ['apple10', 'Apple'],
+        ['Яблоко', 1200],
+        [13000, 'Банан'],
+        ['Apple', 'apple1'],
+        ['banana', 'банан'],
+        [100000, 13000],
+        ['Banana', 'Яблоко'],
+        ['Банан', 'banana'],
+        [1200, 'apple'],
+        ['apple1', 'apple10'],
+        ['яблоко', 100000],
+        ['банан', 'яблоко'],
+    ];
+
+    public function testSortWithStringValues(): void
+    {
+        shuffle($this->arrayWithStringValues);
+
+        ArrayHelper::sortValuesByNatural($this->arrayWithStringValues);
+
+        $this->assertSame([
+            1200,
+            13000,
+            100000,
+            'Apple',
+            'Banana',
+            'apple',
+            'apple1',
+            'apple10',
+            'banana',
+            'Банан',
+            'Яблоко',
+            'банан',
+            'яблоко',
+        ], $this->arrayWithStringValues);
+    }
+
+    public function testSortWithArrayValues(): void
+    {
+        shuffle($this->arrayWithArrayValues);
+
+        // For first index
+        ArrayHelper::sortValuesByNatural($this->arrayWithArrayValues, 0);
+
+        $this->assertSame([
+            [1200, 'apple'],
+            [13000, 'Банан'],
+            [100000, 13000],
+            ['Apple', 'apple1'],
+            ['Banana', 'Яблоко'],
+            ['apple', 'Banana'],
+            ['apple1', 'apple10'],
+            ['apple10', 'Apple'],
+            ['banana', 'банан'],
+            ['Банан', 'banana'],
+            ['Яблоко', 1200],
+            ['банан', 'яблоко'],
+            ['яблоко', 100000],
+        ], $this->arrayWithArrayValues);
+
+        shuffle($this->arrayWithArrayValues);
+
+        // For other index
+        ArrayHelper::sortValuesByNatural($this->arrayWithArrayValues, 1);
+
+        $this->assertSame([
+            ['Яблоко', 1200],
+            [100000, 13000],
+            ['яблоко', 100000],
+            ['apple10', 'Apple'],
+            ['apple', 'Banana'],
+            [1200, 'apple'],
+            ['Apple', 'apple1'],
+            ['apple1', 'apple10'],
+            ['Банан', 'banana'],
+            [13000, 'Банан'],
+            ['Banana', 'Яблоко'],
+            ['banana', 'банан'],
+            ['банан', 'яблоко'],
+        ], $this->arrayWithArrayValues);
+    }
+}
diff --git a/user_guide_src/source/outgoing/localization.rst b/user_guide_src/source/outgoing/localization.rst
index 837807989b0d..0aa680371255 100644
--- a/user_guide_src/source/outgoing/localization.rst
+++ b/user_guide_src/source/outgoing/localization.rst
@@ -284,6 +284,27 @@ Before updating, it is possible to preview the translations found by the command
 
     php spark lang:find --verbose --show-new
 
+The detailed output of ``--verbose`` also shows a list of invalid keys. For example:
+
+.. code-block:: console
+
+    ...
+
+    Files found: 10
+    New translates found: 30
+    Bad translates found: 5
+    +------------------------+---------------------------------+
+    | Bad Key                | Filepath                        |
+    +------------------------+---------------------------------+
+    | ..invalid_nested_key.. | app/Controllers/Translation.php |
+    | .invalid_key           | app/Controllers/Translation.php |
+    | TranslationBad         | app/Controllers/Translation.php |
+    | TranslationBad.        | app/Controllers/Translation.php |
+    | TranslationBad...      | app/Controllers/Translation.php |
+    +------------------------+---------------------------------+
+
+    All operations done!
+
 For a more accurate search, specify the desired locale or directory to scan.
 
 .. code-block:: console